<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form action="demo004.php method="GET">
圆环数量:<input type="text" name="c" /><br/>
起始圆的直径:<input type="text" name="h" /><br/>
<input type="submit" value="提交" />
<input type="reset" value="取消" />
</form>
           <?php
    
    
            ?>
</body>
</html>